[857] | 1 | #ifndef BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP
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| 2 | #define BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP
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| 3 |
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| 4 | // MS compatible compilers support #pragma once
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| 5 | #if defined(_MSC_VER) && (_MSC_VER >= 1020)
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| 6 | # pragma once
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| 7 | #endif
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| 8 |
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| 9 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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| 10 | // mb_from_wchar.hpp
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| 11 |
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| 12 | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
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| 13 | // Use, modification and distribution is subject to the Boost Software
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| 14 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 15 | // http://www.boost.org/LICENSE_1_0.txt)
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| 16 |
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| 17 | // See http://www.boost.org for updates, documentation, and revision history.
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| 18 |
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| 19 | #include <cassert>
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| 20 | #include <cstddef> // size_t
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| 21 | #include <cstdlib> // for wctomb()
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| 22 |
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| 23 | #include <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME
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| 24 | #if defined(BOOST_NO_STDC_NAMESPACE)
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| 25 | namespace std{
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| 26 | using ::size_t;
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| 27 | using ::wctomb;
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| 28 | } // namespace std
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| 29 | #endif
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| 30 |
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| 31 | #include <boost/pfto.hpp>
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| 32 | #include <boost/iterator/iterator_adaptor.hpp>
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| 33 |
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| 34 | namespace boost {
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| 35 | namespace archive {
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| 36 | namespace iterators {
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| 37 |
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| 38 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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| 39 | // class used by text archives to translate wide strings and to char
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| 40 | // strings of the currently selected locale
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| 41 | template<class Base> // the input iterator
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| 42 | class mb_from_wchar
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| 43 | : public boost::iterator_adaptor<
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| 44 | mb_from_wchar<Base>,
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| 45 | Base,
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| 46 | wchar_t,
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| 47 | single_pass_traversal_tag,
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| 48 | char
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| 49 | >
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| 50 | {
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| 51 | friend class boost::iterator_core_access;
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| 52 |
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| 53 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_adaptor<
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| 54 | mb_from_wchar<Base>,
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| 55 | Base,
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| 56 | wchar_t,
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| 57 | single_pass_traversal_tag,
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| 58 | char
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| 59 | > super_t;
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| 60 |
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| 61 | typedef mb_from_wchar<Base> this_t;
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| 62 |
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| 63 | char dereference_impl() {
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| 64 | if(! m_full){
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| 65 | fill();
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| 66 | m_full = true;
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| 67 | }
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| 68 | return m_buffer[m_bnext];
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| 69 | }
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| 70 | char dereference() const {
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| 71 | return (const_cast<this_t *>(this))->dereference_impl();
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| 72 | }
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| 73 |
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| 74 | // test for iterator equality
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| 75 | bool equal(const mb_from_wchar<Base> & rhs) const {
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| 76 | // once the value is filled, the base_reference has been incremented
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| 77 | // so don't permit comparison anymore.
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| 78 | return
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| 79 | 0 == m_bend
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| 80 | && 0 == m_bnext
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| 81 | && this->base_reference() == rhs.base_reference()
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| 82 | ;
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| 83 | }
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| 84 |
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| 85 | void fill(){
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| 86 | wchar_t value = * this->base_reference();
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| 87 | #if (defined(__MINGW32__) && ((__MINGW32_MAJOR_VERSION > 3) || ((__MINGW32_MAJOR_VERSION == 3) && (__MINGW32_MINOR_VERSION >= 8))))
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| 88 | m_bend = std::wcrtomb(m_buffer, value, 0);
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| 89 | #else
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| 90 | m_bend = std::wctomb(m_buffer, value);
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| 91 | #endif
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| 92 | assert(-1 != m_bend);
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| 93 | assert((std::size_t)m_bend <= sizeof(m_buffer));
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| 94 | assert(m_bend > 0);
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| 95 | m_bnext = 0;
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| 96 | }
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| 97 |
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| 98 | void increment(){
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| 99 | if(++m_bnext < m_bend)
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| 100 | return;
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| 101 | m_bend =
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| 102 | m_bnext = 0;
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| 103 | ++(this->base_reference());
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| 104 | m_full = false;
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| 105 | }
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| 106 |
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| 107 | // buffer to handle pending characters
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| 108 | int m_bend;
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| 109 | int m_bnext;
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| 110 | char m_buffer[9];
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| 111 | bool m_full;
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| 112 |
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| 113 | public:
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| 114 | // make composible buy using templated constructor
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| 115 | template<class T>
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| 116 | mb_from_wchar(BOOST_PFTO_WRAPPER(T) start) :
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| 117 | super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast<T>(start)))),
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| 118 | m_bend(0),
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| 119 | m_bnext(0),
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| 120 | m_full(false)
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| 121 | {}
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| 122 | // intel 7.1 doesn't like default copy constructor
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| 123 | mb_from_wchar(const mb_from_wchar & rhs) :
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| 124 | super_t(rhs.base_reference()),
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| 125 | m_bend(rhs.m_bend),
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| 126 | m_bnext(rhs.m_bnext),
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| 127 | m_full(rhs.m_full)
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| 128 | {}
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| 129 | };
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| 130 |
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| 131 | } // namespace iterators
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| 132 | } // namespace archive
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| 133 | } // namespace boost
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| 134 |
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| 135 | #endif // BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP
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